![\"\"](\"https:\/\/blogs.glowscotland.org.uk\/gc\/public\/hyndsecphysn5s4\/uploads\/sites\/5147\/2014\/11\/Picture51.png\" "\\"Picture5\\"")
<\/a><\/p>\nA projectile has two separate <\/strong>motions at right angles to each other.<\/p>\n Each motion is independent <\/strong>of the other.<\/p>\n The horizontal <\/strong>motion is at a constant velocity <\/strong>since there are no forces acting horizontally (air resistance can be ignored).<\/p>\n The vertical <\/strong>motion is one of constant acceleration<\/strong>, equal to g (10 m\/s2<\/sup> on earth).<\/p>\n For projectiles which are projected horizontally, the initial vertical velocity is zero.<\/p>\n For vertical calculations, use\u00a0<\/span><\/p>\n \u00a0<\/span><\/p>\n Velocity time graphs for horizontal and vertical motion<\/span><\/strong><\/p>\n Example<\/em><\/strong><\/p>\n An aircraft flying horizontally at 200 m\/s, drops a food parcel which lands on the ground 12 seconds later.<\/em><\/p>\n Calculate:<\/em><\/p>\n a) the horizontal distance travelled by the food parcel after being dropped<\/em><\/p>\n b) the vertical velocity of the food parcel just before it strikes the ground<\/em><\/p>\n c) the height that the food parcel was dropped from.<\/em><\/p>\n Solution<\/em><\/strong><\/p>\n (a useful layout is to present the horizontal and vertical data in a table or in two data columns)<\/em><\/p>\n (then select the data you need for the question, and clearly indicate whether you are using horizontal or vertical data).<\/em><\/p>\n (a)\u00a0 <\/em>(Draw a velocity time graph of vertical <\/strong>motion)<\/em><\/p>\n \u00a0<\/strong><\/p>\n \u00a0<\/strong><\/p>\n \u00a0<\/strong><\/p>\n \u00a0<\/strong><\/p>\n \u00a0<\/strong><\/p>\n \u00a0<\/strong><\/p>\n \u00a0<\/strong><\/p>\n Satellites and Projectile Motion<\/span><\/strong><\/p>\n If a projectile is launched with sufficient horizontal velocity, it will travel so far that the curvature of the Earth must be taken into account.<\/p>\n Now imagine a projectile launched with such a great horizontal velocity that it never reaches the ground! It will continue to circle the Earth until its horizontal velocity decreases.\u00a0<\/em><\/p>\n The satellite orbits around the Earth because it is in constant free-fall due to the Earth\u2019s gravity.<\/p>\n Apparent Weightlessness<\/em><\/strong><\/p>\n Astronauts in orbit around the Earth are in a constant state of free-fall.\u00a0 The spaceship, the astronauts and everything inside are all accelerating towards the Earth due to gravity.<\/p>\n This is known as apparent weightlessness.\u00a0 The effects are because of gravity, and not <\/strong>because they have escaped from the gravitational field of the Earth.<\/p>\n","protected":false},"excerpt":{"rendered":" Section 3 \u2013 Projectile Motion \u00a0 A projectile is an object which has been given a forward motion through the air, but which is also pulled downward by the force of gravity. This results in the path of the projectile being curved. A projectile has two separate motions at right angles to each other. Each … Continue reading “Projectile motion”<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-10","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysn5s4\/wp-json\/wp\/v2\/pages\/10","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysn5s4\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysn5s4\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysn5s4\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysn5s4\/wp-json\/wp\/v2\/comments?post=10"}],"version-history":[{"count":29,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysn5s4\/wp-json\/wp\/v2\/pages\/10\/revisions"}],"predecessor-version":[{"id":88,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysn5s4\/wp-json\/wp\/v2\/pages\/10\/revisions\/88"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/hyndsecphysn5s4\/wp-json\/wp\/v2\/media?parent=10"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/a><\/a><\/p>\n<\/a><\/span><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a>Newton\u2019s thought experiment allowed us to understand satellite orbits.<\/p>\n